<template>
  <div style="width: 500px">
    <el-input
      placeholder="请输入部门名称进行搜索..."
      prefix-icon="el-icon-search"
      v-model="filterText"
    >
    </el-input>

    <el-tree
      :data="deps"
      :props="defaultProps"
      :filter-node-method="filterNode"
      :expand-on-click-node="false"
      ref="tree"
    >
      <span
        class="custom-tree-node"
        slot-scope="{ data }"
        style="display: flex; justify-content: space-between; width: 100%"
      >
        <span>{{ data.name }}</span>
        <span>
          <el-button
            class="depBtn"
            type="primary"
            size="mini"
            @click="() => showAddDep(data)"
          >
            添加部门
          </el-button>
          <el-button
            class="depBtn"
            type="danger"
            size="mini"
            @click="() => deleteDep(data)"
          >
            删除部门
          </el-button>
        </span>
      </span>
    </el-tree>
    <el-dialog title="添加部门" :visible.sync="dialogVisible" width="30%">
      <div>
        <table>
          <tr>
            <td><el-tag>上级部门</el-tag></td>
            <td>{{ pname }}</td>
          </tr>
          <tr>
            <td><el-tag>部门名称</el-tag></td>
            <td>
              <el-input
                v-model="dep.name"
                placeholder="请输入部门名称"
              ></el-input>
            </td>
          </tr>
        </table>
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="doAddDep">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'DepMana',
  data() {
    return {
      filterText: '',
      deps: [],
      defaultProps: {
        children: 'children',
        label: 'name',
      },
      dialogVisible: false,
      dep: {
        name: '',
        parentId: -1,
      },
      pname: '',
    }
  },
  methods: {
    filterNode(value, data) {
      if (!value) return true
      return data.name.indexOf(value) !== -1
    },
    initDeps() {
      this.getRequest('/system/basic/department/').then((resp) => {
        if (resp) {
          this.deps = resp
        }
      })
    },
    showAddDep(data) {
      this.dep.parentId = data.id
      this.pname = data.name
      this.dialogVisible = true
    },
    deleteDep(data) {
      if (data.isParent) {
        this.$message.error('父部门删除失败')
      } else {
        this.$confirm(
          '此操作将永久删除[' + data.name + ']部门, 是否继续?',
          '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning',
          }
        )
          .then(() => {
            this.deleteRequest('/system/basic/department/' + data.id).then(
              (resp) => {
                if (resp) {
                  this.removeDepFromDeps(null, this.deps, data.id)
                }
              }
            )
          })
          .catch(() => {
            this.$message({
              type: 'info',
              message: '已取消删除',
            })
          })
      }
    },
    doAddDep() {
      this.postRequest('/system/basic/department/', this.dep).then((resp) => {
        if (resp) {
          this.addDepToDeps(this.deps, resp.obj)
          this.dialogVisible = false
          this.initDep()
        }
      })
    },
    initDep() {
      this.dep = {
        name: '',
        parentId: -1,
      }
      this.pname = ''
    },
    addDepToDeps(deps, dep) {
      for (let i = 0; i < deps.length; i++) {
        let d = deps[i]
        if (d.id == dep.parentId) {
          if (d.children == null) {
            d.children = []
          } //因为会报错是null
          d.children = d.children.concat(dep)
          if (d.children.length > 0) {
            d.isParent = true
          }
          return
        } else {
          this.addDepToDeps(d.children, dep)
        }
      }
    },
    removeDepFromDeps(p, deps, id) {
      for (let i = 0; i < deps.length; i++) {
        let d = deps[i]
        if (d.id == id) {
          deps.splice(i, 1)
          if (deps.length == 0) {
            p.isParent = false
          }
          return
        } else {
          this.removeDepFromDeps(d, d.children, id)
        }
      }
    },
  },
  mounted() {
    this.initDeps()
  },
  watch: {
    filterText(val) {
      this.$refs.tree.filter(val)
    },
  },
}
</script>

<style>
.depBtn {
  padding: 2px;
}
</style>